Friction draft-gearing and buffing apparatus.



PATBNTBD SEPT. 29,1903; S

J. TIMMS. FRIGTION DRAFT GBARING AND BUFFING APPARATUS.

APPLIOATION FILED 001 13; 1902. I

H0 MODEL.

A iW/ [#VENTOR WITNESSES If Alma UNITED STATES ZPatented September 29,1903.

PATENT JAMES TIMMS, OF COLUMBUS, OHlO, ASSIGNOR TO THE BUCKEYE MALLE-ABLE IRON AND COUPLER COMPANY, OF COLUMBUS, OHIO.

. FRICTION DRAIFT-GEARTING ANDVBUFFING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 740,335, datedSeptember 29, 1903.

Application filed October 13, 1902. Serial No. 127,064. (No model.)

To all whom it may concern:

Be it known that I, JAMES TIMMS, of Columbus, in the county of Franklinand State of Ohio, have invented certain new and useful Improvements inFriction Draft-Gearing and Bufting Apparatus; and I dohereby declare thefollowing to be a full, clear, and exact de-' and combinations andarrangements of parts,

as will be more fully hereinafter described, and pointed out in theclaims.

In the accompanying drawings, Figure 1 is an elevation illustrating myimprovements. Fig. 2 is a longitudinal sectional view, and Fig. 3 is across-section.

1 represents parallel draft-irons secured to the draft-timbers of thecar and cast with pockets or seats 2 for end followers 3, around which ayoke-strap 4 is passed and secured to the draw-bar 5 of the coupling.These followers 3 are provided at their opposite ends with projectingbeveled blocks or bearingfaces 6, which bear against the beveled orwedge-shaped ends 7 of friction-plates 7,

which extend from one follower to the other,

and it is the wedge shape of these ends 7* which gives to the gear theincreased friction, as will more fully hereinafter appear. Against theinner faces of wedge-shaped ends 7 inside followers 8 are located andmade with beveled faces 9 to bear against the wedges. These insidefollower-plates 8 are recessed, forming seats for coiled springs 1 1 and12, compressed between them, there being,

. preferably, five of the smaller springs 11,10-

cated one at each corner of the plates and one at the center, and one ofthe larger springs 12 surrounding the central spring 11. springs serveto hold the inside follower-plates 8 against the inner faces ofwedge-shaped ends The.

7 of friction plates 7, pressing the latter apart and holding saidwedge-shaped ends against the beveled ends of followers 3, pressing thelatter apart and against the ends of their seats in draft-irons 1.

Theoperation of my improvements is as follows: When there is pressure ora pull upon the draft-gear, one end follower 3 is moved toward theother, the latter-being stopped by its seat in draft-iron l. The beveledor inclined ends 6 of followers 3, engaging the Wedge -shaped ends 7 offriction plates 7, force the friction-plates toward each other, and asthe wedges '7 engage the beveled or inclined outer faces of insidefollower-plates 10 the latter are forced toward each other, contractingthe springs, thus taking up the jar,

and the springs will return the parts to their normal positions whenstrain is discontinued. By constructing theends 7 of friction-plates 7in the form of wedges, as shown, it will be seen that the friction ofthe followers 3, ends 7 and inside follower-plates 10 is very great andthat the frictional engagement increases the more the insidefollower-plates 10 move toward each other, as the width of the wedgesincreases from their outer to their inner ends, thus increasing thefriction, to take up great jars and at the same time permitting slightdare to be compensated for aswell.

A great manychanges might be made in the 7 general form and arrangementof the parts described without departing from my invention, and henceIdo not confine myself to the precise construction set forth, butconsider myself at liberty to make such slight changes and alterationsas fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is- V 1. In a friction draft-gear thecombination with two end followers constructed with converging inclinedfaces and two interposed friction members each having outwardly-flaringwedge-shaped ends which contact with the end followers, and are forcedinwardly thereby, and two inner followers each provided with converginginclined faces, which engage the inner inclined faces of thewedge-shaped ends of said friction elements andforce the latteroutwardly, and a spring interposed between the inner followers,substantially as set forth.

2. In a friction draft-gear the combination with two end followers eachconstructed with converging inclined faces and two interposed frictionmembers or elements each having outwardly-inclined wedge-shaped endswhich contact with the end followers and are forced inwardly thereby,the flaring ends of each member being rigidly connected by side pieces,of two inner followers and an inter-- posed spring which serve to forcethe interposed friction elements outwardly, substantiallyas set forth.

3. In a friction draft-gear, the combination with two end followers eachconstructed with converging inclined faces and two interposed frictionelements each provided with outwardly-inclined wedge-shaped ends whichcontact with the end followers and are forced inwardly thereby, of twoinner followers each of which is provided with converginginclined facesthat engage the inclined wedge-shaped ends of said friction elements andforce the latter outwardly, and a series of springs interposed betweenthe inner followers, substantially as set forth.

4. In a friction draft-gear and buffing apparatus, the combination withtwo end followers having projecting beveled blocks or bearing faces, offriction plates having wedges at both ends against the bearingblocks ofthe respective end followers and of greatest thickness adjacent to theplate and diminishing in thickness to their free ends, a second set offollowers having beveled ends contacting with the inner faces of saidwedgeshaped ends of the friction-plates and a spring forcing saidlast-mentioned followers apart.

5. In a draw-gear and buffing apparatus the combination with endfollower-plates each having oppositeinwardly-inclined faces formingwedges, of opposite inside wedges having outwardly-inclined faces, eachface forming an angle with the opposite faces on the endfollower-plates, of two pairs of connected wedges each having outsidefaces that con- I tact with the bevels on the end follower-plates andinside faces that contact with the bevels on the inside wedges, and aspring pressing the inside wedges in opposite directions.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JAMES TIMMS.

Witnesses:

SAMUEL P. DUsLE, W. F. GOODSPEED.

